Find a unit vector at which the quadratic form xTAx is maximized, subject to the constraint xTx = 1.A = 
A. 
B. 
C. 
D. 
Answer: B
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The life expectancy E, in solar lifetimes, of certain stars depends on their mass M, in solar masses. The relationship is 
.
How does the life expectancy of larger stars compare with that of smaller stars? A graph of E versus M can help you answer this question.
?
A. Larger stars live 2.5 times as long as smaller stars. B. Larger stars have longer life expectancy. C. Larger stars have shorter life expectancy. D. All of the above.
Find the x-intercepts of the graph of each equation.y = 10x2 + 31x + 15
A. 
, 
B. 
, 
C. 
, 
D. 
, 
Provide an appropriate response.Find an equation of the tangent line to the curve x2 + y2 + xy = 16 at the point (0, 2).
Fill in the blank(s) with the appropriate word(s).
Solve the equation.6y = 5y - 8.8
A. {-19.8} B. {6} C. {8.8} D. {-8.8}